Mechanism of Soil Erosion by Wind on Sandy Land in West Jilin Province

DAI Quan-hou; YU Li-fei; LIU Ming-yi; WANG Yan

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Mechanism of Soil Erosion by Wind on Sandy Land in West Jilin Province

- Mechanism of Soil Erosion by Wind on Sandy Land in West Jilin Province
- Bulletin of Soiland Water Conservation Vol. 27, Issue 3, Pages: 81-84(2008)
- 作者机构：
  
  1. 吉林省水土保持科学研究院,吉林,长春,130033
  2. 贵州大学林学院,贵州,贵阳,550025
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2008
- 稿件说明：
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DAI Quan-hou, YU Li-fei, LIU Ming-yi, et al. Mechanism of Soil Erosion by Wind on Sandy Land in West Jilin Province[J]. Bulletin of Soiland Water Conservation, 2008, 27(3): 81-84.
DOI：

DAI Quan-hou, YU Li-fei, LIU Ming-yi, et al. Mechanism of Soil Erosion by Wind on Sandy Land in West Jilin Province[J]. Bulletin of Soiland Water Conservation, 2008, 27(3): 81-84. DOI：

摘要

风蚀危害是吉林省西部沙地的主要自然灾害之一。通过典型样地调查和室内风洞试验

分析了该区沙地土壤风蚀机理。结果表明

土壤风蚀随地表粗糙度、土壤含水量和有机质含量的增加而减小

其风蚀量与地表粗糙度、土壤含水量近似地呈负指数关系

与土壤有机质含量呈负相关。风是吉林省西部沙地产生风蚀的主要源动力

当风速超过临界起沙风速时

土壤侵蚀量与风速的3次方成正比

其风蚀性气候因子为155.2

春季最大(76.2)。在空间分布上

该区风蚀性气候因子和侵蚀性风能均自东向西递增

西北部的通榆县为最大。

Abstract

Soil erosion by wind is one of the main natural disasters on the sandy land in West Jilin Province.Based on field investigation

tests

and indoor wind tunnel experiment

the mechanism of soil erosion by wind on sandy land is analyzed.Analyses indicate that soil erosion by wind constantly decreases with the increases in surface roughness

soil moisture content

and organic matter content.A negative exponential relation with surface roughness and soil moisture content and a negative relation with organic matter content are found.Wind is the main force driving soil erosion on the sandy land in the region.When wind velocity exceeds the critical velocity

soil erosion is proportional to the third power of wind velocity.Climate factor for soil erosion by wind is 155.2.Erosion in spring is the severest(76.2).Spatially

both erosive climate factor and erosive wind energy increase from west to east. Yutong County in the northwest part of the region has the greater values.

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